煤矿安全2018，Vol.49Issue(4)：197-200,4.DOI:10.13347/j.cnki.mkaq.2018.04.051
煤矿采空区卸压空间分布特征研究
Study on Spatial Distribution Characteristics of Pressure Relief in Coal Mine Goaf
李小琴 1聂鑫 2郝国才1
作者信息
- 1. 太原理工大学 矿业工程学院,山西 太原 030024
- 2. 华润金融控股有限公司,广东 深圳 518000
- 折叠
摘要
Abstract
In order to study the pressure relief distribution characteristics of coalbed methane in goaf, we use FLAC3D software to simulate the three -dimensional stress distribution of the surrounding rock after excavation of coal seam. The distribution characteristics of the unloading space in goaf are divided based on the calculation results. The results show that the distance from the center of the coal seam increases, and the stress in the vertical direction increases sharply, then the velocity increases slowly until it approaches to the stress of the original rock; with the increase of the distance from the boundary of the goaf, the triaxial stress on the coal pillar increases sharply first, then decreases sharply and gradually tends to the original rock stress; the overall distribution of the unloading space in goaf is approximately "crab", and the unloading space of the goaf in the upper part of the coal seam is obviously greater than that in the lower part.关键词
煤矿/采空区/采动应力/完全卸压带/卸压空间Key words
coal mine/goaf/mining stress/full depressurization belt/pressure relief space分类
矿业与冶金引用本文复制引用
李小琴,聂鑫,郝国才..煤矿采空区卸压空间分布特征研究[J].煤矿安全,2018,49(4):197-200,4.
